<?php

/*
 * Copyright 2008 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#namespace tehframework\mvc\annotations;

#use \BadMethodCallException;
#use \Reflector;
#use \ReflectionMethod;
#use tehframework\annotations\Annotation;
#use tehframework\annotations\AnnotationTargetAware;

class RendererAnnotation implements Annotation, AnnotationTargetAware
{
	/**
	 * @var string
	 */
	private $type;
	
	/**
	 * @var ReflectionMethod
	 */
	private $renderer;
	
	/**
	 * @param  string? $type
	 */
	public function __construct($type = null)
	{
		$this->setType($type);
	}
	
	/**
	 * @param  ReflectionMethod $annotationTarget
	 * @throws BadMethodCallException
	 */
	public function setAnnotationTarget(Reflector $annotationTarget)
	{
		if (!$annotationTarget instanceof ReflectionMethod)
		{
			throw new BadMethodCallException();
		}
		
		$this->renderer = $annotationTarget;
	}
	
	/**
	 * @return ReflectionMethod
	 */
	public function getRenderer()
	{
		return $this->renderer;
	}
	
	/**
	 * @return string?
	 */
	public function getType()
	{
		return $this->type;
	}
	
	/**
	 * @param  string $type
	 * @return RendererAnnotation
	 */
	public function setType($type)
	{
		$this->type = empty($type) ? null : $type;
		
		return $this;
	}
	
	/**
	 * Returns a bitwise flag of targets which can be annotated
	 * with this annotation.
	 * 
	 * @return int
	 *         A bitwise flag of method target. 
	 */
	public function getAnnotationTargets()
	{
		return Annotation::TARGET_METHOD;
	}
	
	/**
	 * Determines whether annotation can be used multiple times
	 * on a single target.
	 * 
	 * @return bool
	 *         Always FALSE. This annotation can not be used multiple times on
	 *         single target.
	 */
	public function allowsMultiple()
	{
		return false;
	}
	
	/**
	 * @return string
	 */
	public function serialize()
	{
		return serialize(array($this->type, $this->renderer));
	}
	
	/**
	 * @param  string $serialized
	 */
	public function unserialize($serialized)
	{
		$unserialized = unserialize($serialized);
		
		$this->type     = $unserialized[0];
		$this->renderer = $unserialized[1];
	}
}